Agilent Technologies 2948, 2712A manual Contents

Model 8904A Contents

CONTENTS

Replaceable Parts
Section 6 .
Introduction to This Section	6.1
Reference Designations and Abbreviations Used in This Manual	6.1
Replaceable Parts List	6.1
Ordering Parts	6.1
Replaceable Parts List Updating (Manual Updates)	6.2
Mechanical and Chassis Part Locations and Reference Designations	6.2
Instrument Changes
Section 7 .
Introduction to This Section	7.1
Option Conversions	7.1
Instrument Modifications	7.1
Firmware Updates (A2U12 and A2U13)	7.8
Hardware Modifications	7.8
Modification for Possible Ground Wire Shock Hazard	7.9
Modification for Output Overvoltage Protection Improvement	7-13
Modification for Potential Power Supply Short	7-14
Service
Section 8 .
Introduction to This Section	8.1
How the Section is Organized	8.1
Safety Considerations	8.1
Before Applying Power	8.1
Safety	8-1
Service Tools, Helps, and Information	8-3
Printed Circuit Board Extractor	8.3
Assembly, Parts. and Cable Locations	8.3
Other Service Documents	8.3
Recommended Test Equipment and Accessories	8.3
Schematic Symbology and Schematic Diagram Notes	8.3
Principles of Operation	8-15
Overall	8-15
A2 Digital Assembly	8-23
A3 Output Assembly (Service Sheets 1through 4)	8-24
Troubleshooting	8-29
General	8-29
A2 Digital Assembly to A3 (or A10) Output Assembly Interface	8-30
A2 Digital Assembly to A1 Keyboard Assembly Interface	8-38
A2 Digital Assembly to A5 Display Assembly Interface	8-41
A3 or A10 Output Assembly	8-42

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